Dusting powder and method of manufacturing same



Patented Aug. 3, 19 32 UNITED STATES- PATENT OFFICE GEORGE ETEELBEBTSANDERS, 01 NEW YORK, N. Y.

DUSTING POWDER AND METHOD OF MANUFACTURING SAME No Drawing.

This invention relates to a dry dusting 'powder adapted for use as afungicide, a

disinfectant, or an insecticide.

It has been proposed to use various compounds and derivatives ofcresylic acid in the form of liquid spray, paint or wash as adisinfectant or insecticide but the opera-- tion of spraying has manydisadvantages as compared with dusting'in that it takes more labor andtime and is not so well adapted to either hilly or muddy ground.

' The object of the present invention is a dry dusting powder which willallow the ingredients to be applied to the foliage of treeswiththe-su'perior speed, ease and economyof dusting as compared withspraying. The dusting powder to act in the preventing of certain fungusdiseases,as a repellent in preventing certain insects from destroyingthe foliage, as an insecticide i i-killing certain insects and adisinfectant in'destroying certain bacteria.

A further object of theinvention is the provision of a method of forminga dry dusting powder consisting substantially of lime and cresol or thecresol bearing distillate from a tar'or tar like substance. The endproduct consisting'partly of calcium cresy commercially as cresylic acidor the cresol bearing distillate from a tar or tar like sublate in drypowdered form. v

The proportion of cr'esylic acid used may be varied to suit theresistance of the plant to be treated andtheresistance of the insect ordisease to be combatted. I @Since it is now well established that theapplication of a fungicide or insecticide in the form ofpowder possessesnumerous advantages over spraying or washing, I have provided a methodand product of forming such a dust by combining cresol or the cresolbearing distillate from a'tar or tar like substance with avehicleto'form a dry dusting powder which mav be-used to reach such partsadapted to be treated and where it is more desirable to dustthan tospray.

Hereinafter I shall refer to what is known stance as cresylicvacid.

In carrying out my invention, I prefer to form a portion of the cresolinto calcium Application filed March 30, 1927. Serial No. 179,712.

cresylate in the following economical manner, by reacting the cresylicacid or the cresol bearing distillate from a tar or tar like substancewith the hydrated lime in the presence of a relatively inert flufi'er orpowder which does not in itself react appreciably with the cresylicacid, the powder being added in order to make the mass friable andeasily broken up. Such inert or semi-inert powders as infusorial earth,tobacco dust, talc or fullers earth may be used. The

cresylic acid may be added to the flufier or relatively inertpowderbefore it is mixed with the hydrated lime or it may be mixed 'with thehydrated lime after the hydrated lime has been mixed with the flufi'eror relatively inert powder, the object being to have the reactionbetween the lime and the cresylic acid, take place in the presence ofthe flufi'er or relatively inert powder. in order that the 'finalproduct may be friable andv easily blown through a dusting machine andspread 'lightly and evenly over the object to be treated.

The product may be used directly after the reactionhas taken place or itmay be milled before using, the milling being done either immediatelyafter the three ingredients, the cresol, the lime and the inert powder'have been mixed or after the reaction between the lime and cre'sylicacidhas taken place- The amount of milling necessary depends entirely onthe quality of product desired and the use for which it is intended.

' I prefer to confine this dust in a tight con- The cresol containingpowder may be value without danger of plant injury.

instance, the percentage of cresol in the dust mixed or used incombination with various insecticides, fungicides, repellents, ordisinfectants without departing from the spirit of the invention. Thecresol containing powder maybe either the primary or secondaryinsecticide, fungicide, repellent or disinfectant. For instance, amixture of infusorial earth and. cresylic acid may be added to a copperlime arsenic dust consisting of hydrated lime, monohydrated coppersulphate and calcium arsenate. The resulting calcium cresylate thusformed will be most essential as a. repellent to certain insects notcontrolled bythe arsenic. As another instance, calcium cresylate dustmight be added to a mixture of sulphur and lead arsenate for the samepurpose. Again the'calcium cresylate dust may be used directly and aloneas a repellent and fungicide or any fungicide or insecticide poseswithout departing from the spirit of I the invention.

I claim:

A process of forming a containing calcium cresylate which comprisesabsorbing cresylic acid on infusorial earth and then mixing withhydrated lime, the infusorial earth actin as a flufier and preventingthe cresylic aci and hydrated lime from forming a cake when combiningand form in calcium cresylate. igned at New York, in the county of NewYork and State of New York, this twentyninth day of March, A. D. 1927.

GEORGE ETHELBERT SANDERS.

may be added to it in order to increase its v For may be close to themargin of safety on foliage but still not quite strong enough to controlthe disease to be combatted. The addition of a copper compound would notincrease the danger of foliage injury but would increase the valueof thedust in the. control of the fungus. The same holds true of its additionto com ounds of sulphur, arsenic, nicotine, etc., at e'reverse may bethe case.

For the purpose of economy and efliciency I prefer to usea grade ofcommercial creylic acid which is substantially cresylic aci or thecresol bearing distillate of a tar or tar like substance but other gradeof cresylic acid may be used.

I prefer to use infusorial earth as the flufier on account of its.ability liquids to a great extent and still remam a powder and. onaccount of a portion of it mixed with hydrated lime improvm the dustingand flowing roperties of hy rated lime. Other dr pow tobacco dust, fulers earth, etc., however may be used as the flufier without departingfrom the spirit of the invention.

It is possibl to form calcium cresylate by reacting cresol or cresylicacid with almost any form of lime such ascalcium.oxide, calciumcarbonate or calcium hydroxide and the end product be satisfactory orother salts of metals of the earth alkali group, in which I mean toincludecaldium, strontium, barium, magnesium, etc., may be substitutedto form barium cresylate, magnesium cresylate, etc.,

without departing from the spirit of the invention. The inert flufier orpowder'is used merely to attain a finely) divided powder containing therequired amount of cresol compounds with greater ease and economy.

Various liberators or adhesives or coaters to prevent or retardliberation of the cresylic acid may be added forvarious special purtoabsorb ers such as clays, talc,

dry dusting powder

